LOANS - PCI Loans - Unpaid Balance and Carrying Amount (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Impaired Financing Receivable, Unpaid Principal Balance	$ 14,799	$ 18,323
Financing Receivable, Nonaccrual	12,573	15,610
Commercial Portfolio Segment
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Impaired Financing Receivable, Unpaid Principal Balance	641	1,000
Financing Receivable, Nonaccrual	304	622
Construction and Land Portfolio Segment
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Impaired Financing Receivable, Unpaid Principal Balance	87	100
Financing Receivable, Nonaccrual	40	51
Commercial Real Estate Portfolio Segment
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Impaired Financing Receivable, Unpaid Principal Balance	11,710	14,096
Financing Receivable, Nonaccrual	10,329	12,416
Residential Portfolio Segment
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Impaired Financing Receivable, Unpaid Principal Balance	2,361	3,127
Financing Receivable, Nonaccrual	1,900	2,521
Consumer Portfolio Segment
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Financing Receivable, Nonaccrual	$ 0	$ 0